Arconic 918 Series, Instruction Manual

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9
918 series Powerig Hydraulic Units (HK786
)
Maintenance
PREVENTIVE MAINTENANCE
An effective preventive maintenance program includes
scheduled inspections to detect and correct minor troubles:
1. Inspect hydraulic and electrical fittings to be sure they are
secure.
2. Inspect hoses frequently for signs of damage. Replace
hoses if damage is detected.
3. Inspect during operation to detect any abnormal heating,
vibration or leakage.
4. Inspect hydraulic fluid periodically and replace if
contamination is detected. Clean sump filter if fluid is
dirty and being replaced. NOTE: Light on bulkhead will
come on when filter is dirty and oil should be replaced.
5. Keep hood in place and keep all exterior surfaces clean.
6. Replace oil filter every six months or if oil filter light on
bulkhead comes on. A filter element can be ordered from
Huck, part number 507089.
7. Do not block ventilation louvers at end of unit. Maintain a
minimum of 4 inches of clearances from louvers to wall or
solid object.
COMBINATION VALVE OVERHAUL
Combination valves should be returned to the nearest repair
facility shown on the inside of the back cover of this manual
if a major overhaul is necessary. Minor overhaul includes
cleaning and replacing seals, perishable parts and high wear
components. Huck recommends only minor overhaul by the
user.
One spare combination valve should be kept on hand for
each POWERIG Hydraulic Unit.
Smear LUBRAPLATE 130AA, or hydraulic fluid, on O-rings and
other components when reassembling combination valve.
Follow Figure 7 for proper position of all components.
OUTPUT PRESSURES
To prevent malfunctions, check and adjust PULL and
RETURN pressures of POWERIG® Hydraulic Unit. Check
pressures when:
• Unit is being used for the first time.
• Any part of combination valve is repaired.
• Combination valve is replaced.
• Troubleshooting is to be performed.
• Before any tool is connected.
• Whenever tool does not perform as expected.
• Whenever unsure of the pressure setting.
LUBRIPLATE is a registered trademark of Fiske Brothers Refining Co.
CAUTION: Do not operate POWERIG if line
voltage is lower than 5 percent below normal.
WARNING: Only a qualified electrician
is to install the power cable, according
to local electrical codes, and service the
electrical control and disconnect panel.
ALWAYS DISCONNECT PRIMARY POWER
SOURCE FROM HYDRAULIC UNIT WHEN
PERFORMING MAINTENANCE. This includes
opening panels and access doors. SEVERE
ELECTRICAL BURNS OR ELECTROCUTION
MAY RESULT IF THIS PRECAUTION IS NOT
TAKEN. Other serious injuries may occur
from mechanical components, such as the
fan, if the motor unexpectedly starts.
WARNING: After overhauling combination
valve, PULL and RETURN pressures must be
checked. Serious personal injury may occur
if excessive pressure causes violent hose or
installation equipment failure.
WARNING: Excessive pressures may cause
violent rupture of some part of the fastening
system. Exploding components may cause
severe or fatal injuries to personnel in the
vicinity. If the system does not rupture,
continuous higher than normal pressure will
cause premature wear of equipment.